Nested profiling support for Linux-perf Profiler (#87904)
Add a stack of start counter values, and attribute each disable to the last enable
Differential Revision: [D40539212](https://our.internmc.facebook.com/intern/diff/D40539212/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87904
Approved by: https://github.com/SS-JIA
